peridotite Meaning, Definition & Usage
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noun a dark coarse-grained igneous rock consisting principally of olivine
WordNet
Per"i*do*tite noun
Etymology
Cf. F.Definitions
(Min.) An eruptive rock characterized by the presence of chrysolite (peridot). It also usually contains pyroxene, enstatite, chromite, etc. It is often altered to serpentine. ✍ The chief diamond deposits in South Africa occur in a more or less altered peridotite.
